Scientific innovations are not restricted to creating useful gadgets or machines. In fact, studies reveal that there are many scientific aspects that we can explore, particularly with regards to human body. One such recent example is the production of heat in the body which can create electricity: German scientists have identified a mechanism of converting body heat into electricity with the help of circuitry. This means that, in future, we will be able to operate our television and cellphones with nothing but the heat of our own body! Scientists are also hoping that this innovation will help reduce the world's energy problems.